mqcs.mcusum {qcr} | R Documentation |
Function to plot mcusum chart
Description
This function is used to compute statistics required by the mcusum chart.
Usage
mqcs.mcusum(x, ...)
## Default S3 method:
mqcs.mcusum(
x,
data.name = NULL,
limits = NULL,
Xmv = NULL,
S = NULL,
k = 0.5,
h = 5.5,
method = "sw",
plot = FALSE,
...
)
## S3 method for class 'mqcd'
mqcs.mcusum(
x,
limits = NULL,
Xmv = NULL,
S = NULL,
k = 0.5,
h = 5.5,
method = "sw",
plot = FALSE,
...
)
Arguments
x |
an R object (used to select the method). See details. |
... |
arguments passed to or from methods. |
data.name |
a string that specifies the title displayed on the plots. If not provided it is taken from the name of the object's data. |
limits |
a two-values vector specifying the control limits. |
Xmv |
is the mean vector. It is only specified for Phase II or when the parameters of the distribution are known. |
S |
is the sample covariance matrix. It is only used for Phase II or when the parameters of the distribution are known. |
k |
is a constant used in MCUSUM chart. Frequently k = 0.5 |
h |
is a constant used in MCUSUM chart. Usually h = 5.5 |
method |
is the method employed to compute the covatiance matrix in the individual observation case. Two methods are used "sw" for compute according to (Sullivan,Woodall 1996a) and "hm" by (Holmes,Mergen 1993) |
plot |
a logical value indicating that it should be plotted. |
Author(s)
Edgar Santos-Fernandez
Examples
##
## Continuous data
##
library(qcr)
data(dowel1)
str(dowel1)
data.mqcd <- mqcd(dowel1)
res.mqcs <- mqcs.mcusum(data.mqcd)
summary(res.mqcs)
plot(res.mqcs, title =" MCUSUM Control Chart for dowel1")